Recorder.



P. FUESS.

RECORDER.

APPLICATION FILED JUNE 16, 1914.

,1 ,1 1 5,302., Patented Oct. 27, 1914.

MiG/M fML/L extent.

PAUL FUESS, OF BERLIN-STEG'LITZ, GERMANY.

RECORDER.

Specification of Letters Patent.

Patented Oct. 27,1914.

Application am June 16, 1am. Serial No. 245,345.

To all whom it may concern:

Be it known that I, PAUL Ftmss, sub ect of the Emperor of Germany,resldmg at Berlin-Steglitz, Germany, have invented new and usefulImprovements in Recorders, of which the following is a specification.The present invention relates to record ers, and consists in improvedmechanism for driving the surfaces on which the records are made. Thesesurfaces, hereinafter termed the recording surfaces, are usually eitherof drum form, and are carried by similarly formed means rotatable on astationary axle, or of plate form, the similarly formed carrying meansbeing then fed rectilinearly. In either case the values or measurementswhich it is desired'to record appear in the form of curves, which resultfrom these surfaces passing under the recording pen. The rotary orrectilinear motion of the said means is usually imparted by clockwork,which of 'course must be wound up from time to time, The inconvenienceattending this frequent winding is particularly felt in the case ofapparatus which remains erected for a very long time at placesaccessible only with difficulty, as for example at observatories onmountains. and towers, in anchored balloons which are Without occupant,in shafts, bore-holes and so on.

The object of the present invention is to obviate this drawback, and tothis end, any one of the known, continuously operative forces of natureis utilized as the source of energy for actuating the mechanism fordriving the recording surface. In this way, clockwork can be dispensedwith and the recorder can be left to itself until the recording surfacehas been utili zed to its full For this purpose, the driving mechanismfor the recording surface is operatively connected to a device whichconverts onto motion the variat ons of a cpnpmuously operatrve naturalforce, for exarnpe, of the pressure or temperature of the air. The saiddevice may consist of a barosco e, thermoscope, hygroscope or the like.he operative connection is such that the movements reduced by theparticular device when t e said variations 'occuractuate the saidmechanism and the recording drum. therefore makes a further movementonly when a change in the natural force (pressure, temperature,humidity) occurs.

TW embodiments of the present invent n w ardly-directed pawl thereforeco nmg into i are illustrated by way of example in thev acnompanyingdrawing, wherein Flgure 1 shows a device comprisin a baroscope forfeeding a recording sur ace of drum shape, Fig, 2 is a top plan view ofthe feed-mechanism for the drum, and Fig.

3 shows a device comprising both a baroscope and a thermoscope forfeeding the drum, the latter recording both the barometric and'thermometric variations.

Referring to F ig, 1, showing the barometric recorder, the pen-carryinglever 3 1s mounted to rock on the frame 2 by means of the pivot -1, andis linked to the exhausted measuring chamber 5 by means of the pivot 4;In this way'the said lever, by means of the pen thereon, records on therecording surface of the drum 6 the elongations and contractions of thesaid chamber.

n this apparatus, the variations in atmospheric pressure serve as theactuatin force for rotating the drum. This is e fected by means of themetal chambers 7, which carry a rod 8 slidable in the guide 9 andpivotally connected at 10 to the lever 11. This lever 11 at one-end ispivoted at 12 to the frame and at the other end 13 is pivoted to theforked member 14;, 15: At the two ends of this member are provided pawls16, 17 which are inclined-t0 the periphery of the toothed wheel 18 andare substantially parallel to one another. These pawls en-- gagethewheel 1 8 which has very small teeth and is fast on the axle 19 ofthe drum. The axle 19 is rotatably mounted at its lower end, and isrigidly connected to the drum. v 4 I The above-described device operatesas follows ;When, owing to a change in atmospheric pressure, the metalchambers 7 expand, they drive the rod 8 to the right.

The lever 11 therefore swings to the right by turning about the pivotalaxis 12 and the forked pawl-me her is also shifted" to the.

right. The paw 16 which is directed ri htwardly therefore'rotates thetoothed w eel '18, and consequently the drum 5, on the axle 19, thedirection of rotation being clockwise. The'leftwardly directed pawl 17,however, rides over the teeth as they pass under it and so remains outof gear. When the chamhers 7 again contract as the result of the actionof atmospheric pressure, the system 14 15, moves leftwardly, theleftgear, while the rightwardly directed pawl tion.

16 rides over the ratchet'teeth. The drum therefore always rotates inthe same dircc- The extent of its rotation depends on the variations ofpressure which are manifested by the metal chambers 7.

Instead of the-baroscope 7 8 adevice influenced by the variations of anyother force of nature may be employed for transmitting motion to thedriving mechanism of the recording surface. Such devices include athermoscope, hygroscope and the like.

Referring to the embodiment shown in Fig. 3, the drum is here fedforward by two sets of mechanism of the kind shown in Fig. 2, the upperset being driven, as before, by a baroscope, and the lower set being nowdriven by a thermoscope. The apparatus is so constructed that both thevariations in atmospheric pressure as well as in temperature are eachrecorded by a separate pen on the drum. To this end, the stationary wall20 of the frame carries, securely fastened to it, a metal plate 21,which is highly sensitive to temperature variations and the free end 22of which is operatively connected with a recording arm 25 by means ofrods 23, 24. The recording arm is pivoted to an arm 26 fast on the wall20. On the support 27 is mounted the set of metal chambers 28 formeasuring atmospheric pressure, which, by means of the rod 29 pivotedat,30 actuate a rod 32 fulcrumed about the stationary axis 31. The rod32 is connected by links 33, 34 to the rotatable axle 35 of therecording arm 36.

Screwed to the wall 20 is a second metal plate 37 which is sensitive totemperature and which is pivoted at 38 to the stem of the forked member39. The latter member carries at its forked ends pawls which, in themanner shown in Fig. 2. are so directed that they turn the toothed wheel40 in the same direction no matter whether they move backward orforward. This toothed wheel is fast on the vertical axle 41 of the drum.

" The wall of the frame carries, rigidly mounted at 42, a second set ofmetal chambers 43, to which a rod 44 is rigidly secured.

This rod is pivoted at 45 to the lever 46, which is fulcrumed on astationary axis 47 and 1s plvoted at 48 to a forked member 49.

"The latter is likewise provided with pawls as in Fig. 2 which engagethe toothed wheel 50 fast on the axle 41 of the drum. At each movementof the forked member 49, these pawls turn the drum-axle in one and thesame direction, z. e., the same direction in which the pawls of themember 39 turn it. At the same time, owing to variations'in airtemperature, the plate 37 extends or bends and transmits its motion byway "of the joint 38 to the forked member v39, which, by means of itspawls, likewise turns the ;drum-axle.

The recording surface may serve to record the variations of eachparticular force of the same time.

nature, or any desired number of forces simultaneously, the records inthe latter case being superposed. The last described apparatus with twoor more sets of driving mechanism is advantageous in that stoppage ofthe driving mechanism and recording surface is almost impossible, for invery rare cases are two or more forces of nature absolutely constant,2'. 6. Without variation, at When one force of nature remains unchanged,the variations of the other are available, so that practically alwaysone or the other driving mechanism is in action. In this way, byemploying this embodiment, continuous forward movement of the recordingsurface can be insured. Also, in'case one of the sets ofmcchanism getsout of order for any reason, the movement of the recording surface isnot arrested, because then, the other natural force which is utilizedcontinues to operate its particular set of mechanism. The recordingsurface travels quicker in this embodiment than with only one drivingforce. Consequently greater abscissze are usually furnished for therecords, and in that way greaterdistinct-ness and clearness areobtainable. In addition the movementof the recording surfacei-s moreregular and this contributes to better records being produced.

What I claim as my invention and desire to secure by Letters Patentis 1. In recorders, the combination with a recording surface, of meansactuable by a continuously operative varying force of nature for drivingsaid surface in one direction only during all variations in the op- Ierative force.

2. In recorders, the combination with a recording surface. of mechanismactuable ineither direction for driving said surface in one directiononly, and a device movable in accordance with variations in acontinuously operative force of nature and operaforce of nature fordriving said surface in one direction only during all variations in theoperative force.

4. In recorders, the combination with a recording surface, and means forregistering on said surface values in accordance with variations in acontinuously operativevarying force of nature, of means actuable by thesame force of nature for driving said surface in one direction onlyduring all variations in the operatives force.

5. In recorders, the combination with a recording surface, of meansactuable by a plurality of continuously operative varying forces ofnature for driving said surface in one direction only during allvariations of the operative forces.

6. In recorders, the combination with a recording surface and means forsimultaneously registering on said surface values in accordance with thevariations of a plurality of continuously operative varying forces ofnature, of means actuable by the same forces of nature for driving saidsurface in one direction only during all variations of the operativeforces.

7. In recorders, the combination With a plurality ofrecording surfacesand means for simultaneously registering on each surface values inaccordance with the variations of a continuously operative force ofnature, of means actuable by all these forces of nature for driving saidsurfaces simultaneously in one direction only during all variations ofthe operative forces.

only, and a plurality of devices actuable in I accordance withvariations of the same forces of nature, and each operatively connectedto a set of said mechanism to actuate the'same during all Variations ofthe operative force.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

PAUL FUESS.

. Witnesses HENRY HAsrER, WOLDEMAR HAUPT.

